Wi-Fi standards are the technical specifications, written by the IEEE under the 802.11 family, that define how wireless local area networks transmit data. Since 2018 the Wi-Fi Alliance, the industry body that certifies products, has labeled them as numbered generations: Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 and 6E (802.11ax) and Wi-Fi 7 (802.11be). For buyers, the generation sets what access points and devices can do, and so shapes refresh timing, cabling, switching and power decisions.
At a glance
- The IEEE writes the 802.11 standards; the Wi-Fi Alliance certifies products and uses the simpler “Wi-Fi 6, 6E, 7” names.
- Each generation improves capacity in busy spaces, not just peak speed, which matters more for offices.
- Wi-Fi 6E and Wi-Fi 7 can use the 6 GHz band where regulators allow it, adding clean spectrum for supporting devices.
- Newer access points often need multi-gigabit switch ports and more Power over Ethernet (PoE) budget.
- Benefits depend on client devices: a network gets the most from a new standard as laptops and phones that support it arrive.
What problem it solves
Offices now have more wireless devices per person than ever, and nearly every application runs over the network. Older Wi-Fi designs struggle when dozens of devices compete for the same channels, so users see slow downloads, choppy calls and dropped connections at busy times, even when the internet connection has capacity to spare.
Each Wi-Fi generation addresses some of that. Newer standards serve more devices at once, reduce interference between neighboring networks, use spectrum more efficiently and, from Wi-Fi 6E, open up new spectrum. Understanding the generations helps buyers decide when an upgrade will actually help, and what the rest of the wireless LAN needs in order to support it.
How it works
Each generation is designed to be backward compatible in the bands it shares with earlier ones, so older devices generally keep working. The differences are in how efficiently the air is used.
Wi-Fi 6 (802.11ax)
Wi-Fi 6 works in the 2.4 and 5 GHz bands. Its main gains are for crowded spaces: OFDMA lets an access point serve several devices in one transmission, improved multi-user MIMO serves more devices at once, and target wake time helps battery-powered devices save power. Many networks deployed in recent years are Wi-Fi 6.
Wi-Fi 6E
Wi-Fi 6E is Wi-Fi 6 extended into the 6 GHz band, where regulators allow it. That band offers more and wider channels with less congestion from older devices. Only 6E-capable devices can use it, and 6 GHz signals generally travel less far through walls, which can mean more access points. The amount of 6 GHz spectrum, and the power and indoor/outdoor rules, vary by country.
Wi-Fi 7 (802.11be)
Wi-Fi 7 builds on 6E with wider channels in the 6 GHz band, denser modulation, and multi-link operation, which lets a device use more than one band at once for speed or reliability. Its peak speeds call for multi-gigabit uplinks, and its access points can draw more power than older models, so switches and PoE budgets need checking.
Around the radio
Security moved forward with the generations: the Wi-Fi Alliance requires WPA3 for Wi-Fi 6 certification, and 6 GHz networks require WPA3-level security. Access point capacity also depends on the wired side: switch ports, uplinks, cabling and PoE.
For help planning a wireless refresh, see our Wired and Wireless LAN Infrastructure solution page.
When it matters for buyers
- Planning a refresh. Access points are often replaced on a hardware refresh cycle; the generation you buy will be in service for years.
- New offices. Cabling, switch ports and power should be planned for current access points, not the last generation.
- Busy spaces. Conference rooms, open-plan floors and warehouses with many devices gain most from newer standards.
- Managed Wi-Fi contracts. Check which generation the provider deploys and when it refreshes; see managed Wi-Fi.
Questions to ask vendors
- Which Wi-Fi generation do you recommend for our sites, and why?
- What share of our current laptops, phones and scanners support Wi-Fi 6E or 7?
- What switch port speeds, uplinks and PoE budget do the access points need?
- How many access points will we need, and is that based on a measured or predictive survey?
- What 6 GHz rules apply at each of our locations?
- Do the access points support WPA3, and can our older devices still connect securely?
- How long will this hardware be supported with software and security updates?
How it differs from a WLAN
A wireless local area network (WLAN) is the network itself: the access points, controllers, switches, settings and devices in a building. Wi-Fi standards are the rules that the WLAN’s radios follow. Upgrading to a newer standard means replacing access points and often supporting gear, but a well-designed WLAN on an older standard can still outperform a poorly designed one on a newer standard.